There are several different kinds of muscular diseases including Duchene, myotonic, congenital, distal, becker, facioscapulohumeral, Emery-Dreifuss, oculopharyngeal and limb-girdle, according to the U.S. National Institutes of Health and WebMD. In fact, there are over 30 different kinds of muscular diseases in the body.
In muscular dystrophy, the muscular disease, the muscles are unable to move effectively. The muscles that people control start to weaken and the person is unable to move their muscles to function normally, reports WebMD. Sometimes the organs, such as the heart, are also weakened. In these cases, the prognosis is worse. In the United States alone, there are 50,000 Americans who suffer from a muscular dystrophy disease.
The most common form of the disease in adults is the myotonic muscular dystrophy disease, writes WebMD. It starts to become noticeable when the person is younger, but comes into full force in adulthood. The symptoms of myotonic muscular dystrophy are worse in the cold and involve stiffening muscles as well as muscle spasms.
The most common form of the disease in children is the Duchene muscular dystrophy disease, writes WebMD. Only male children can get this disease and, if the child is going to get it, it typically surfaces around 2 to 6 years of age. The disease typically progresses quickly and most children with Duchene will need to be in a wheelchair by their early teens.